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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag has occurred near Hihifo in Tonga

Posted by admin on October 26, 2025 0 Comments

Earthquake location -16.6692S, -173.4988WA light earthquake magnitude 4.2 (ml/mb) strikes 85 kilometers (53 miles) from Hihifo in Tonga on Sunday. The temblor was detected at 09:19:11 / 9:19 am (local time epicenter). The earthquake occurred at a depth of 35 km (22 miles). Exact location of earthquake, -173.4988° West, -16.6692° South, depth 35 km. Global time and date of event 28/09/25 / 2025-09-28 09:19:11 / September 28, 2025 @ 9:19 am UTC/GMT. Event ids that are associated to the earthquake: us6000riau. Id of event: us6000riau. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Epicenter of the earthquake was 86 km (53 miles) from Hihifo (c. 800 pop). Closest city/cities/towns to epicentrum/hypocenter was Hihifo (min 5000 pop). Close country/countries that might be effected, Tonga (c. 123 000 pop).

Every year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days three and in the last 365 days sixty-six earthquakes of magnitude 3.0 or greater that have been detected nearby.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 85 km SSE of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -173.4988° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.6692° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 85 km SSE of Hihifo, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-09-28 09:19:11 Time when the event occurred. UTC/GMT
Updated 2025-10-26 07:07:14 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 271 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used 24 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 3.206 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.8 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 133 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us6000riau Id of event.
Event Code 6000riau An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000riau, A comma-separated list of event ids that are associated to an event.

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